[build] extra: add release/extra/completion/duniter_completion.bash script

Script to add bash completion to duniter cli command
7 jobs for feature/bash-completion in 25 minutes and 41 seconds (queued for 1 minute and 2 seconds)
Status Job ID Name Coverage
  Tests
passed #38566
redshift
tests

00:10:18

75.44%
 
  Package
manual #38568
redshift allowed to fail manual
package:test:docker-test-image
manual #38567
redshift allowed to fail manual
releases:test
 
  Quality
passed #38570
redshift
audit_dependencies

00:02:25

canceled #38569
redshift
fmt_and_clippy

00:15:23

 
  Integration
canceled #38571
redshift manual
sync_g1

canceled #38572
redshift manual
sync_gtest